Memcached Java客户端2.6.1发布
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Memcached Java客户端2.6.1发布
- 博客分类：
- memcached
memcachedJavaGmailITeyeperformance
Memcached是被广泛使用的分布式缓存技术。不同的语言有不同的Memcached客户端程序，对于Java客户端来说，首推Memcached Java Client（http://github.com/gwhalin/Memcached-Java-Client ）。
这次，Memcached Java Client推出的2.6.1发布版是基于全新的performance分支，具有如下重大改进：
- 较之老版本，在性能上有300%左右的提升；
- 兼容老版本，用户无须修改自己的源代码；
- 支持多个memcached协议，包括text，udp和binary协议；
- 支持SASL认证机制；
- 重新实现的连接池，修复了之前的连接数太多所导致的OutOfMemory异常；
- 加入了slf4j logger支持，使得开发人员可以方便的记录日志；
- 支持自定义的对象序列化方法。
这个分支由Schooner Information Technology贡献，并由Schooner中国团队完成开发，开发者是：
- 王新根，new.root@gmail.com；
- 李蒙，jowett.lee@gmail.com，IT eye博客地址是：http://menglee.iteye.com
可以从这里下载二进制包：https://github.com/gwhalin/Memcached-Java-Client/downloads
源代码在github上，http://github.com/gwhalin/Memcached-Java-Client ，然后选择performance分支。
下面是一些性能测试的数据，包括了当前流行的Memcached Java Client。其中，schooner指的是这个分支的text protocol， schooner_bin指的是binary protocol。
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18 楼 747578076 2015-09-02
您好，请问我用2.6.6版本，请问SockIOPool下的哪个方法 配置 所连接的Memcache的用户密码登陆？
17 楼 modowei 2013-07-30
问下性能提升了300%上针对1.X版本吗？
我测了下2.5X和3.0的性能没什么差别
到是比1.X提升了3、4倍
我测了下2.5X和3.0的性能没什么差别
到是比1.X提升了3、4倍
16 楼 sunwine 2013-05-29
继续吐槽，还有Bug
failover,failback开启时，性能问题
failback开启时，如果一个memcached挂掉，由于程序始终要做back尝试（没有详细阅读这块代码，猜测），导致任何一次访问挂掉memcached服务器上数据，都会尝试建立访问挂掉服务器的socket，导致每次访问都要消耗connectTimeout时间，返回非常慢
大体看了下whalin版本的
在selfMaint做维护时尝试访问挂掉服务器，如果不成功等待1秒，下次再尝试时还不成功等待1*2秒，以此类推，好像whalin版本中这个自维护还是有些价值的
楼主，要多做测试啊
还有个建议，增加一个动态增减memcached服务器的函数，这样子可靠性才好，否则一旦memcached内存不够用，只能停web服务啊，学习下xmemcached
failover,failback开启时，性能问题
failback开启时，如果一个memcached挂掉，由于程序始终要做back尝试（没有详细阅读这块代码，猜测），导致任何一次访问挂掉memcached服务器上数据，都会尝试建立访问挂掉服务器的socket，导致每次访问都要消耗connectTimeout时间，返回非常慢
大体看了下whalin版本的
在selfMaint做维护时尝试访问挂掉服务器，如果不成功等待1秒，下次再尝试时还不成功等待1*2秒，以此类推，好像whalin版本中这个自维护还是有些价值的
楼主，要多做测试啊
还有个建议，增加一个动态增减memcached服务器的函数，这样子可靠性才好，否则一旦memcached内存不够用，只能停web服务啊，学习下xmemcached
15 楼 sunwine 2013-05-28
正在试用这个版本，好像测试得不是很完整啊，有几个Bug啊：
storeCounter函数好像不正确，直接存储Long型数据到服务器，后续Incr/Decr就不正确了：
public boolean storeCounter(String key, Long counter, Date date, Integer hashCode) {
return set(key, counter, date, hashCode);
此处counter没有转换为字符串再存储
}
getCounter函数好像也不正确，连接MemCache1.2.6(Windows版本)时，如果做Decr，一旦最后数值小于初始值长度时，服务器返回的数值字符串中会含有空格，此时getCounter获取会失败，返回-1，例如：初始计数器值为10，做一次Decr后值为9，此时从服务器获取的实际数据是“9 ”（9加一个空格），此时getCounter把该字符串转换为Long型会出错
storeCounter函数好像不正确，直接存储Long型数据到服务器，后续Incr/Decr就不正确了：
public boolean storeCounter(String key, Long counter, Date date, Integer hashCode) {
return set(key, counter, date, hashCode);
此处counter没有转换为字符串再存储
}
getCounter函数好像也不正确，连接MemCache1.2.6(Windows版本)时，如果做Decr，一旦最后数值小于初始值长度时，服务器返回的数值字符串中会含有空格，此时getCounter获取会失败，返回-1，例如：初始计数器值为10，做一次Decr后值为9，此时从服务器获取的实际数据是“9 ”（9加一个空格），此时getCounter把该字符串转换为Long型会出错
14 楼 goohere 2013-02-05
作者用ObjectTransCoder来实现对象的解码，你set的值也的相对应编码才行
25weiqin 写道
楼主好。在使用memcached client 2.5 和2.6版本时，都遇到如下的错误，还请帮忙帮看一下：
现象：从mysql memcached客户端插入一条记录，如："test","test",在telnet 命令行和 memcached client 2.0.1版本(设置setPrimitiveAsString(true))都get获取正常。但是使用版本 2.5，2.5.1 和 2.6时都会抛出如下的错误
// exception thrown
log.error("++++ exception thrown while trying to get object from cache for key: " + key);
com.danga.MemCached.MemCachedClient Tue Aug 16 11:17:56 CST 2011 - ++++ exception thrown while trying to get object from cache for key: test117
com.danga.MemCached.MemCachedClient Tue Aug 16 11:17:56 CST 2011 - invalid stream header: 76616C75
java.io.StreamCorruptedException: invalid stream header: 76616C75
at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
at java.io.ObjectInputStream.<init>(Unknown Source)
at com.schooner.MemCached.ObjectTransCoder.decode(ObjectTransCoder.java:57)
at com.schooner.MemCached.AscIIClient.get(AscIIClient.java:761)
at com.schooner.MemCached.AscIIClient.get(AscIIClient.java:612)
at com.schooner.MemCached.AscIIClient.get(AscIIClient.java:608)
at com.danga.MemCached.MemCachedClient.get(MemCachedClient.java:1047)
at TestM.main(TestM.java:56)
操作时通过设置可分布式环境的要求变量 client。setPrimitiveAsString(true)，和 pool.setHashingAlg(2);还请楼主帮忙看一下是怎么回事？
现象：从mysql memcached客户端插入一条记录，如："test","test",在telnet 命令行和 memcached client 2.0.1版本(设置setPrimitiveAsString(true))都get获取正常。但是使用版本 2.5，2.5.1 和 2.6时都会抛出如下的错误
// exception thrown
log.error("++++ exception thrown while trying to get object from cache for key: " + key);
com.danga.MemCached.MemCachedClient Tue Aug 16 11:17:56 CST 2011 - ++++ exception thrown while trying to get object from cache for key: test117
com.danga.MemCached.MemCachedClient Tue Aug 16 11:17:56 CST 2011 - invalid stream header: 76616C75
java.io.StreamCorruptedException: invalid stream header: 76616C75
at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
at java.io.ObjectInputStream.<init>(Unknown Source)
at com.schooner.MemCached.ObjectTransCoder.decode(ObjectTransCoder.java:57)
at com.schooner.MemCached.AscIIClient.get(AscIIClient.java:761)
at com.schooner.MemCached.AscIIClient.get(AscIIClient.java:612)
at com.schooner.MemCached.AscIIClient.get(AscIIClient.java:608)
at com.danga.MemCached.MemCachedClient.get(MemCachedClient.java:1047)
at TestM.main(TestM.java:56)
操作时通过设置可分布式环境的要求变量 client。setPrimitiveAsString(true)，和 pool.setHashingAlg(2);还请楼主帮忙看一下是怎么回事？
13 楼 jade88 2013-01-11
楼主，你好，如何关闭连接，shutdown不管用。
12 楼 bukebuhao 2012-09-05
Memcached Java Client2.5.2，线上出现java.lang.OutOfMemoryError
at sun.misc.Unsafe.allocateMemory(Native Method)
at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:126)
at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:306)
at com.schooner.MemCached.SchoonerSockIOPool$TCPSockIO.<init>(Unknown Source)。
最新的2.6.1已修复这个bug，不过，我本地模拟大并发量，为何2.5.2也不出现内存溢出。
能不能给我一段测试代码，重现bug，好确认是不是这个问题。谢谢！！配置参数最好给个参考实例
at sun.misc.Unsafe.allocateMemory(Native Method)
at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:126)
at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:306)
at com.schooner.MemCached.SchoonerSockIOPool$TCPSockIO.<init>(Unknown Source)。
最新的2.6.1已修复这个bug，不过，我本地模拟大并发量，为何2.5.2也不出现内存溢出。
能不能给我一段测试代码，重现bug，好确认是不是这个问题。谢谢！！配置参数最好给个参考实例
11 楼 287854442 2012-08-06
请问有没有2.6.3版本的api文档？？
10 楼 sankby 2012-04-13
为什么我用binary比ascii的慢一倍，需要怎么设置？有测试过的吗
9 楼 rainmanz 2012-03-06
楼主有没有试过当set的值过大的时候会出现下面的错误
[2012-03-05 22:58:29.872]-[ERROR] com.danga.MemCached.MemCachedClient ++++ exception thrown while writing bytes to server on get
[2012-03-05 22:58:29.874]-[ERROR] com.danga.MemCached.MemCachedClient An existing connection was forcibly closed by the remote host
java.io.IOException: An existing connection was forcibly closed by the remote host
at sun.nio.ch.SocketDispatcher.write0(Native Method)
at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:33)
at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:69)
at sun.nio.ch.IOUtil.write(IOUtil.java:26)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:334)
at com.schooner.MemCached.SchoonerSockIOPool$TCPSockIO.flush(SchoonerSockIOPool.java:1547)
at com.schooner.MemCached.BinaryClient.get(BinaryClient.java:1482)
at com.schooner.MemCached.BinaryClient.get(BinaryClient.java:738)
at com.schooner.MemCached.BinaryClient.get(BinaryClient.java:734)
at com.danga.MemCached.MemCachedClient.get(MemCachedClient.java:917)
at com.eshore.crm.memcache.client.SimpleTest$1.run(SimpleTest.java:91)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
null
测试代码如下：
import java.util.UUID;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import com.danga.MemCached.MemCachedClient;
import com.danga.MemCached.SockIOPool;
public class SimpleTest {
// create a static client as most installs only need
// a single instance
protected static MemCachedClient mcc;
// set up connection pool once at class load
static {
// server list and weights
String[] servers = { "10.17.13.49:11212" };
Integer[] weights = { 3, 3, 2 };
// grab an instance of our connection pool
SockIOPool pool = SockIOPool.getInstance();
// set the servers and the weights
pool.setServers(servers);
pool.setWeights(weights);
// set some basic pool settings
// 5 initial, 5 min, and 250 max conns
// and set the max idle time for a conn
// to 6 hours
pool.setInitConn(5);
pool.setMinConn(5);
pool.setMaxConn(250);
pool.setMaxIdle(1000 * 60 * 60 * 6);
// set the sleep for the maint thread
// it will wake up every x seconds and
// maintain the pool size
pool.setMaintSleep(30);
// set some TCP settings
// disable nagle
// set the read timeout to 3 secs
// and don’t set a connect timeout
pool.setNagle(false);
pool.setSocketTO(3000);
pool.setSocketConnectTO(0);
pool.setBufferSize(30000000);
// initialize the connection pool
pool.initialize();
// lets set some compression on for the client
// compress anything larger than 64k
//mcc.setCompressEnable(true);
//mcc.setCompressThreshold(64 * 1024);
mcc = new MemCachedClient(true);
}
public static void main(String args[]){
int k=1;
String[] values= new String[8000];
int j = 0;
for (int i = 0; i < keys.length; i++) {
keys[j] = "3";
j++;
}
BlockingQueue<Runnable> startStopQueue = new LinkedBlockingQueue<Runnable>();
ThreadPoolExecutor taskExecutor = new ThreadPoolExecutor(10,
10, 10, TimeUnit.SECONDS,
startStopQueue);
taskExecutor.allowCoreThreadTimeOut(true);
final String[] vs=values;
final MemCachedClient mc = mcc;
while(k>0){
//mcc.delete("foo");
taskExecutor.submit(new Runnable(){
@Override
public void run() {
//mcc = new MemCachedClient(true);
String key = "foo"+UUID.randomUUID();
mcc.set(key, vs);
Object obj = mcc.get(key);
System.out.println(obj);
}
});
try {
TimeUnit.MICROSECONDS.sleep(100);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
k--;
}
taskExecutor.shutdown();
while(!taskExecutor.isTerminated()){
try {
TimeUnit.SECONDS.sleep(1);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
System.exit(1);
}
}
服务端日志：
<30 new auto-negotiating client connection
30: Client using the binary protocol
<30 Read binary protocol data:
<30 0x80 0x01 0x00 0x27
<30 0x08 0x00 0x00 0x00
<30 0x00 0x00 0x62 0x02
<30 0x00 0x00 0x00 0x00
<30 0x00 0x00 0x00 0x00
<30 0x00 0x00 0x00 0x00
<30 SET foo5eb1b171-68e6-4d82-af89-ba9fed2f368e Value len is 25043
Failed to read, and not due to blocking:
errno: 0 Error 0
rcurr=57ccac4a ritem=5a4272d5 rbuf=57cca2a0 rlbytes=22640 rsize=4096
<30 connection closed.
[2012-03-05 22:58:29.872]-[ERROR] com.danga.MemCached.MemCachedClient ++++ exception thrown while writing bytes to server on get
[2012-03-05 22:58:29.874]-[ERROR] com.danga.MemCached.MemCachedClient An existing connection was forcibly closed by the remote host
java.io.IOException: An existing connection was forcibly closed by the remote host
at sun.nio.ch.SocketDispatcher.write0(Native Method)
at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:33)
at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:69)
at sun.nio.ch.IOUtil.write(IOUtil.java:26)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:334)
at com.schooner.MemCached.SchoonerSockIOPool$TCPSockIO.flush(SchoonerSockIOPool.java:1547)
at com.schooner.MemCached.BinaryClient.get(BinaryClient.java:1482)
at com.schooner.MemCached.BinaryClient.get(BinaryClient.java:738)
at com.schooner.MemCached.BinaryClient.get(BinaryClient.java:734)
at com.danga.MemCached.MemCachedClient.get(MemCachedClient.java:917)
at com.eshore.crm.memcache.client.SimpleTest$1.run(SimpleTest.java:91)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
null
测试代码如下：
import java.util.UUID;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import com.danga.MemCached.MemCachedClient;
import com.danga.MemCached.SockIOPool;
public class SimpleTest {
// create a static client as most installs only need
// a single instance
protected static MemCachedClient mcc;
// set up connection pool once at class load
static {
// server list and weights
String[] servers = { "10.17.13.49:11212" };
Integer[] weights = { 3, 3, 2 };
// grab an instance of our connection pool
SockIOPool pool = SockIOPool.getInstance();
// set the servers and the weights
pool.setServers(servers);
pool.setWeights(weights);
// set some basic pool settings
// 5 initial, 5 min, and 250 max conns
// and set the max idle time for a conn
// to 6 hours
pool.setInitConn(5);
pool.setMinConn(5);
pool.setMaxConn(250);
pool.setMaxIdle(1000 * 60 * 60 * 6);
// set the sleep for the maint thread
// it will wake up every x seconds and
// maintain the pool size
pool.setMaintSleep(30);
// set some TCP settings
// disable nagle
// set the read timeout to 3 secs
// and don’t set a connect timeout
pool.setNagle(false);
pool.setSocketTO(3000);
pool.setSocketConnectTO(0);
pool.setBufferSize(30000000);
// initialize the connection pool
pool.initialize();
// lets set some compression on for the client
// compress anything larger than 64k
//mcc.setCompressEnable(true);
//mcc.setCompressThreshold(64 * 1024);
mcc = new MemCachedClient(true);
}
public static void main(String args[]){
int k=1;
String[] values= new String[8000];
int j = 0;
for (int i = 0; i < keys.length; i++) {
keys[j] = "3";
j++;
}
BlockingQueue<Runnable> startStopQueue = new LinkedBlockingQueue<Runnable>();
ThreadPoolExecutor taskExecutor = new ThreadPoolExecutor(10,
10, 10, TimeUnit.SECONDS,
startStopQueue);
taskExecutor.allowCoreThreadTimeOut(true);
final String[] vs=values;
final MemCachedClient mc = mcc;
while(k>0){
//mcc.delete("foo");
taskExecutor.submit(new Runnable(){
@Override
public void run() {
//mcc = new MemCachedClient(true);
String key = "foo"+UUID.randomUUID();
mcc.set(key, vs);
Object obj = mcc.get(key);
System.out.println(obj);
}
});
try {
TimeUnit.MICROSECONDS.sleep(100);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
k--;
}
taskExecutor.shutdown();
while(!taskExecutor.isTerminated()){
try {
TimeUnit.SECONDS.sleep(1);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
System.exit(1);
}
}
服务端日志：
<30 new auto-negotiating client connection
30: Client using the binary protocol
<30 Read binary protocol data:
<30 0x80 0x01 0x00 0x27
<30 0x08 0x00 0x00 0x00
<30 0x00 0x00 0x62 0x02
<30 0x00 0x00 0x00 0x00
<30 0x00 0x00 0x00 0x00
<30 0x00 0x00 0x00 0x00
<30 SET foo5eb1b171-68e6-4d82-af89-ba9fed2f368e Value len is 25043
Failed to read, and not due to blocking:
errno: 0 Error 0
rcurr=57ccac4a ritem=5a4272d5 rbuf=57cca2a0 rlbytes=22640 rsize=4096
<30 connection closed.
8 楼 cmysunny 2012-02-24
原来项目用2.5.*，put到cache中的对象要实现可序列化接口。项目升级jar包使用2.6.3版本遇到下面这个问题，请楼主百忙之中抽空回复。
google之后，说是新版本不需要序列化，可是使用hibernate框架，entity必须实现序列化接口，请问新的版本有没有提供可配置方式？
下面是异常信息，偶现概率在20%左右
2012-02-24 13:14:39 ERROR[resin-http-:8080-6]com.schooner.MemCached.AscIIClient.get(?:?)- ++++ exception thrown while trying to get object from cache for key: zjwapKeyPefixFrontip_white_list
2012-02-24 13:14:39 ERROR[resin-http-:8080-6]com.schooner.MemCached.AscIIClient.get(?:?)- cn.m8book.cmread.entity.AccessAuthority
java.io.IOException: cn.m8book.cmread.entity.AccessAuthority
at com.schooner.MemCached.ObjectTransCoder.decode(Unknown Source)
at com.schooner.MemCached.AscIIClient.get(Unknown Source)
at com.schooner.MemCached.AscIIClient.get(Unknown Source)
at com.schooner.MemCached.AscIIClient.get(Unknown Source)
at com.danga.MemCached.MemCachedClient.get(Unknown Source)
at com.index_china.common.cache.memcache.MemCachedManager.getFromCache(MemCachedManager.java:250)
at com.index.cmread.filter.MobileSystemContextFilter.doFilter(MobileSystemContextFilter.java:151)
at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:76)
at com.index.cmread.filter.AccessAuthorityFilter.doFilter(AccessAuthorityFilter.java:62)
at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:76)
at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:381)
at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:76)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:76)
at com.caucho.server.cache.CacheFilterChain.doFilter(CacheFilterChain.java:158)
at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:178)
at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:241)
at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:268)
at com.caucho.server.port.TcpConnection.run(TcpConnection.java:586)
at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:690)
at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:612)
at java.lang.Thread.run(Thread.java:619)
google之后，说是新版本不需要序列化，可是使用hibernate框架，entity必须实现序列化接口，请问新的版本有没有提供可配置方式？
下面是异常信息，偶现概率在20%左右
2012-02-24 13:14:39 ERROR[resin-http-:8080-6]com.schooner.MemCached.AscIIClient.get(?:?)- ++++ exception thrown while trying to get object from cache for key: zjwapKeyPefixFrontip_white_list
2012-02-24 13:14:39 ERROR[resin-http-:8080-6]com.schooner.MemCached.AscIIClient.get(?:?)- cn.m8book.cmread.entity.AccessAuthority
java.io.IOException: cn.m8book.cmread.entity.AccessAuthority
at com.schooner.MemCached.ObjectTransCoder.decode(Unknown Source)
at com.schooner.MemCached.AscIIClient.get(Unknown Source)
at com.schooner.MemCached.AscIIClient.get(Unknown Source)
at com.schooner.MemCached.AscIIClient.get(Unknown Source)
at com.danga.MemCached.MemCachedClient.get(Unknown Source)
at com.index_china.common.cache.memcache.MemCachedManager.getFromCache(MemCachedManager.java:250)
at com.index.cmread.filter.MobileSystemContextFilter.doFilter(MobileSystemContextFilter.java:151)
at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:76)
at com.index.cmread.filter.AccessAuthorityFilter.doFilter(AccessAuthorityFilter.java:62)
at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:76)
at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:381)
at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:76)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:76)
at com.caucho.server.cache.CacheFilterChain.doFilter(CacheFilterChain.java:158)
at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:178)
at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:241)
at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:268)
at com.caucho.server.port.TcpConnection.run(TcpConnection.java:586)
at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:690)
at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:612)
at java.lang.Thread.run(Thread.java:619)
7 楼 zogwei 2011-10-27
具有随机性，不是每次都出现
6 楼 zogwei 2011-10-27
我使用2.6.1版本遇到这问题，楼主能帮忙看看吗？
2011-10-27 19:50:48,777 ERROR (com.danga.MemCached.MemCachedClient:443) - ++++ exception thrown while writing bytes to server on set
2011-10-27 19:50:48,793 ERROR (com.danga.MemCached.MemCachedClient:444) - An established connection was aborted by the software in your host machine
java.io.IOException: An established connection was aborted by the software in your host machine
at sun.nio.ch.SocketDispatcher.write0(Native Method)
at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:33)
at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:104)
at sun.nio.ch.IOUtil.write(IOUtil.java:60)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:334)
at com.schooner.MemCached.SchoonerSockIOPool$TCPSockIO.flush(SchoonerSockIOPool.java:1551)
at com.schooner.MemCached.BinaryClient.set(BinaryClient.java:427)
at com.schooner.MemCached.BinaryClient.set(BinaryClient.java:240)
at com.danga.MemCached.MemCachedClient.set(MemCachedClient.java:646)
2011-10-27 19:50:48,777 ERROR (com.danga.MemCached.MemCachedClient:443) - ++++ exception thrown while writing bytes to server on set
2011-10-27 19:50:48,793 ERROR (com.danga.MemCached.MemCachedClient:444) - An established connection was aborted by the software in your host machine
java.io.IOException: An established connection was aborted by the software in your host machine
at sun.nio.ch.SocketDispatcher.write0(Native Method)
at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:33)
at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:104)
at sun.nio.ch.IOUtil.write(IOUtil.java:60)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:334)
at com.schooner.MemCached.SchoonerSockIOPool$TCPSockIO.flush(SchoonerSockIOPool.java:1551)
at com.schooner.MemCached.BinaryClient.set(BinaryClient.java:427)
at com.schooner.MemCached.BinaryClient.set(BinaryClient.java:240)
at com.danga.MemCached.MemCachedClient.set(MemCachedClient.java:646)
5 楼 25weiqin 2011-08-17
楼主好。在使用memcached client 2.5 和2.6版本时，都遇到如下的错误，还请帮忙帮看一下：
现象：从mysql memcached客户端插入一条记录，如："test","test",在telnet 命令行和 memcached client 2.0.1版本(设置setPrimitiveAsString(true))都get获取正常。但是使用版本 2.5，2.5.1 和 2.6时都会抛出如下的错误
// exception thrown
log.error("++++ exception thrown while trying to get object from cache for key: " + key);
com.danga.MemCached.MemCachedClient Tue Aug 16 11:17:56 CST 2011 - ++++ exception thrown while trying to get object from cache for key: test117
com.danga.MemCached.MemCachedClient Tue Aug 16 11:17:56 CST 2011 - invalid stream header: 76616C75
java.io.StreamCorruptedException: invalid stream header: 76616C75
at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
at java.io.ObjectInputStream.<init>(Unknown Source)
at com.schooner.MemCached.ObjectTransCoder.decode(ObjectTransCoder.java:57)
at com.schooner.MemCached.AscIIClient.get(AscIIClient.java:761)
at com.schooner.MemCached.AscIIClient.get(AscIIClient.java:612)
at com.schooner.MemCached.AscIIClient.get(AscIIClient.java:608)
at com.danga.MemCached.MemCachedClient.get(MemCachedClient.java:1047)
at TestM.main(TestM.java:56)
操作时通过设置可分布式环境的要求变量 client。setPrimitiveAsString(true)，和 pool.setHashingAlg(2);还请楼主帮忙看一下是怎么回事？
现象：从mysql memcached客户端插入一条记录，如："test","test",在telnet 命令行和 memcached client 2.0.1版本(设置setPrimitiveAsString(true))都get获取正常。但是使用版本 2.5，2.5.1 和 2.6时都会抛出如下的错误
// exception thrown
log.error("++++ exception thrown while trying to get object from cache for key: " + key);
com.danga.MemCached.MemCachedClient Tue Aug 16 11:17:56 CST 2011 - ++++ exception thrown while trying to get object from cache for key: test117
com.danga.MemCached.MemCachedClient Tue Aug 16 11:17:56 CST 2011 - invalid stream header: 76616C75
java.io.StreamCorruptedException: invalid stream header: 76616C75
at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
at java.io.ObjectInputStream.<init>(Unknown Source)
at com.schooner.MemCached.ObjectTransCoder.decode(ObjectTransCoder.java:57)
at com.schooner.MemCached.AscIIClient.get(AscIIClient.java:761)
at com.schooner.MemCached.AscIIClient.get(AscIIClient.java:612)
at com.schooner.MemCached.AscIIClient.get(AscIIClient.java:608)
at com.danga.MemCached.MemCachedClient.get(MemCachedClient.java:1047)
at TestM.main(TestM.java:56)
操作时通过设置可分布式环境的要求变量 client。setPrimitiveAsString(true)，和 pool.setHashingAlg(2);还请楼主帮忙看一下是怎么回事？
4 楼 ypf3027 2011-06-30
2.6.1版的MemCachedClient删除了2.5.1的所有deprecated方法，
其中setCompressEnable和setCompressThreshold方法是实现数据压缩的设置，删除了这两个方法，是自动实现压缩设置了吗？
其中setCompressEnable和setCompressThreshold方法是实现数据压缩的设置，删除了这两个方法，是自动实现压缩设置了吗？
3 楼 jsczxy2 2011-06-27
用了这个 Memcached Java Client 不错的 效率是越来越高了
2 楼 MengLee 2011-06-26
hxhnarkissos 写道
看到楼主头像想到韩寒····
直接拿你的客户端测试下负载均衡中session情况试试
直接拿你的客户端测试下负载均衡中session情况试试
欢迎试用！
1 楼 hxhnarkissos 2011-06-26
看到楼主头像想到韩寒····
直接拿你的客户端测试下负载均衡中session情况试试
直接拿你的客户端测试下负载均衡中session情况试试
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